Quote Originally Posted by newracer View Post
It has been shown several times that the emissions laws on the Front Range do very little to effect the air quality along the Front Range.
Ayup.
When I worked for CDOT I was privy to air quality reports that were not made public. Motor vehicles actually have little impact on air quality.
Hell, the biggest changer of "the brown cloud" in the metro was CDOT gravitating away from conventional salt and sand, it created tremendous amounts of dust.